Johnson Controls T-4000-630 Conversion Kit

The Johnson Controls T-4000-630 Conversion Kit is a field-proven solution for transitioning existing field-installed pneumatic thermostats to the T-4000 series. This white pneumatic universal conversion kit is designed for technical specialists who need to modernize legacy HVAC controls without a full system overhaul. It facilitates the replacement of dual-temperature or single-temperature controls, ensuring stable pneumatic signal accuracy and consistent pressure regulation across the branch line. By utilizing the T-4000-630, technicians can maintain precise HVAC pneumatic temperature control while leveraging the enhanced durability of modern Johnson Controls components. The kit includes the necessary hardware for a flush or surface mount interface, addressing common alignment issues during thermostat retrofit procedures. Its robust construction ensures reliable operation in demanding commercial environments where maintaining pneumatic calibration is critical for building automation efficiency and thermal comfort.

Key Benefits

• Universal Compatibility: Streamlines the process of upgrading older pneumatic installations to high-performance T-4000 series thermostats.
• Precise Airflow Control: Engineered to minimize hystereses and maintain exact pressure setpoints within the control loop.
• Reduced Downtime: Simplified mounting hardware and clear technical architecture allow for faster field replacement and system re-balancing.
• Professional Aesthetics: The neutral white finish provides a clean, professional appearance suitable for visible commercial wall placements.

Common Questions

How does this kit handle different wall-box configurations?
The T-4000-630 includes versatile mounting plates designed to cover various legacy terminal layouts, allowing for a secure fit on standard electrical boxes or direct-wall interfaces.

Can this be used for both heating and cooling pneumatic cycles?
Yes, it is designed to work with both direct and reverse acting pneumatic thermostats, provided the base T-4000 unit is selected for the specific control action required.

Does the kit include the thermostat unit itself?
This is a conversion kit containing the necessary mounting and interface hardware; the T-4000 series thermostat must be sourced separately based on your specific sequence of operation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.